Debian 10 with ISPconfig 3.2.2 no internet connection after update

Hi, i'm running ispconfig on Debian 10, and after an update Debian 10, I can't connect to internet from the browser on Debian 10
When I ping 8.8.8.8 , this works. But internet isn't connecting.
How to solve this problem.

Thanks
Robin

 

Hi, after I could not connect to the internet, I ping 8.8.8.8 and works, when I used the command "dig google.com" it didn't work.
After I look into the file /etc/resolv.conf, there was only a ipv6 address, But I don't have anymore a IPV6 address only a IPV4 address. So I suppose this is the problem off the DNS issue? But what should I fill in the file /etc/resolv.conf

 

Hi, I now use the name servers from google in the file /etc/resolv.conf, afterwards I reboot the server. Internet is working again.
But I can't also send and receive mails. What should I test to figure out this problem.

 

Ispconfig was not updating/upgrate Debian 10, so I dit this manual. Mail was still working.After this I was configure my Fritzbox with a subnet/29, but had some problems. So I deleted the subnet/29. Reset the Fritzbox to factory defaults, and restart the server. Of course, I redirected the mail ports from my server to
my public address After this I can't receive a send mails.

 

The ports above I have forwarded in the Fritzbox. I use ports 587 en 995 for my mails, also is opened port 25.
But I can't stil not receive or send mails.

 

Hi, I followed the instructions above. But I setup the ispconfig server with Debian 10. And I blocked to reach by webmail or Roundcube from url.
I time ago I commented out 'webmail' from /etc/apache2/conf.d/roundcube. But when I look in the server I can't find anymore the directory conf.d. ?
So I should solve first that I can reach my web mail. I suppose that the link "/etc/apache2/conf.d/roundcube" is not right?
Where can I find the roundcube or webmail directory? so that I can active the webmail/roundcube/